first of all: please make less "." and "" - it makes you look like an idiot
to answer your question:
do not use the dedicated server because it makes everything more complicated (you have to use remote control). create a listen server instead. then you can control everything using menus. http://www.cs2d.com/serverhosting.php#listen
You need to either use a Lua script or RCon ( Remote CONtrol ). If you are the only admin then you don;t need to worry about using Lua, RCon will be fine.
... but he could of bought a server ( ? ) and wants to know how to become and admin on it..? Actually IDK, he needs to actually give a bit more of a description to be honest